I honestly can't think of a single legitimate reason why those two classes make sense together. I'm running through all the scenarios in my head and all I see are a bunch of assault classes getting lit up because they're all trying to heal each other.

So not only do you have to heal people, you're providing ammunition as well? When are you actually supposed to shoot something?

well what is the assault class supposed to do? in battlefield 2 they had no special purpose... except for throwing smoke grenades.

in bad company 2 they combined the support class guns with the medics and gave the support class ammo to the assault class. now they've put the support class back together and combined the medic and assault classes. which is better, they both use similar weapons and the assault class had no real purpose.